capture_pattern

func capture_pattern(source_id: Int, source: String, input: TokenRange, context: &SyntaxContext) -> SyntaxResult<Pattern>

Validates input as exactly one pattern and captures it with use-site hygiene.

Failure preserves the parser diagnostic range; success retains canonical tokens and trivia for later quotation or materialization.

View Source

pub func capture_pattern(source_id: Int, source: String, input: TokenRange, context: &SyntaxContext) -> SyntaxResult<Pattern> {
	let outcome = parse_pattern_tokens(source: source, input: input)
	if let .some(failure) = parse_failure(outcome: outcome, fallback: input.span) {
		return SyntaxResult<Pattern>(value: .none, failure: .some(failure))
	}
	let raw = raw_from_range(source_id: source_id, source: source, input: input, category: .pattern, context: context, origin: .use_site)
	SyntaxResult<Pattern>(value: .some(Syntax<Pattern>(raw: raw)), failure: .none)
}